Troubleshooting With Diagnostic Tools - Oracle X5-8 Service Manual

Troubleshooting With Diagnostic Tools

voltage levels. Insufficient voltage levels or voltage fluctuations can cause server power
problems.
Action: Check that the AC power cords are connected to the server. Check that the correct
power is present at the outlets and monitor the power to verify that it is within the acceptable
range.
AC OK indicators next to the AC inlets on the back of the server are green when the power
■
is connected, and off when it is not.
The AC OK and DC OK indicators on the PSU indicator panels on the front of the system
■
are green when the PSU is functioning properly.
Prevention: Use the AC power cord retaining clips and position the cords to minimize the risk
of accidental disconnection. Ensure that the AC circuits that supply power to the server are
stable and not overburdened.
Power Supplies (PSUs)
The server power supplies (PSUs) provide the necessary server voltages from the AC power
outlets. If the PSUs are inoperable, unplugged, or disengaged from the internal connectors, the
server cannot power on.
Action: Check that the AC cables are connected to both PSUs. Check that the PSUs are
operational (the PSU indicator panel should have a lit green AC OK indicator). Ensure that the
PSU is properly installed. A PSU that is not fully engaged with its internal connector does not
have power applied and does not have a lit green AC OK indicator.
Prevention: When a power supply fails, replace it immediately. When installing a power
supply, ensure that it is fully seated and engaged with its connector inside the drive bay. A
properly installed PSU, has a lit green AC OK indicator.
Troubleshooting With Diagnostic Tools
The server and its accompanying software and firmware contain diagnostic tools and features
that can help you isolate component problems, monitor the status of a functioning system,
and exercise one or more subsystems to disclose more subtle or intermittent hardware-related
problems.
Each diagnostic tool has its own specific strength and application. Review the tools listed in
this section and determine which tool might be best to use for your situation. Once you've
determined the tool to use, you can access it locally, while at the server, or remotely.
70 Oracle Server X5-8 Service Manual • December 2015